/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (C) 2019 Western Digital Corporation or its affiliates. */ #ifndef _ASM_RISCV_FIXMAP_H #define _ASM_RISCV_FIXMAP_H #include <linux/kernel.h> #include <linux/sizes.h> #include <asm/page.h> #include <asm/pgtable.h> #ifdef CONFIG_MMU /* * Here we define all the compile-time 'special' virtual addresses. * The point is to have a constant address at compile time, but to * set the physical address only in the boot process. * * These 'compile-time allocated' memory buffers are page-sized. Use * set_fixmap(idx,phys) to associate physical memory with fixmap indices. */ enum fixed_addresses { FIX_HOLE, #define FIX_FDT_SIZE SZ_1M FIX_FDT_END, FIX_FDT = FIX_FDT_END + FIX_FDT_SIZE / PAGE_SIZE - 1, FIX_PTE, FIX_PMD, FIX_EARLYCON_MEM_BASE, __end_of_fixed_addresses }; #define FIXMAP_PAGE_IO PAGE_KERNEL #define __early_set_fixmap __set_fixmap #define __late_set_fixmap __set_fixmap #define __late_clear_fixmap(idx) __set_fixmap((idx), 0, FIXMAP_PAGE_CLEAR) extern void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot); #include <asm-generic/fixmap.h> #endif /* CONFIG_MMU */ #endif /* _ASM_RISCV_FIXMAP_H */